Fishing – trapping – and vermin destroying
Patent
1992-10-30
1994-03-29
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437107, 437126, 437129, 437133, 156610, 372 43, 372 45, 372 99, H01L 21203
Patent
active
052984540
ABSTRACT:
Applicants have discovered a method of reproducibly fabricating SEED devices having an enhanced contrast ratio by adjusting the thickness of a cap layer in relation to the reflector stacks to form a Fabry-Perot cavity. Specifically, after growth of the reflector stack and the quantum wells, the optical thickness of the region above reflector stacks is measured without breaking vacuum, and based on such measurement a cap layer is grown of sufficient thickness to form a Fabry-Perot cavity for light of desired wavelength. The result is a device with enhanced contrast between the "on" and "off" states sufficiently so that the state can be directly read without differential processing.
REFERENCES:
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Giugni et al. "New Self electro-optic effect device using two wavelengths in InGaAs/AlGaAs Multiple Quantum Wells" Appl. Phys. Lett. 61(1992), 376-378.
Miller et al. "Novel hybrid optically bistable switch: The Quantum Well Self electro-optic effect device" Appl. Phys. Lett. 45(1984), 13-15.
Fujiwara et al. "Electro-optical bistability in Strained In.sub.x Ga.sub.1-x As/Al.sub.0.15 Ga.sub.0.85 As Multiple Quantum Wells" Appl. Phys. Lett. 57(1990), 2234-2236.
D'Asaro Lucian A.
Kuo Jenn-Ming
Pei Shin-Shem
AT&T Bell Laboratories
Books Glen E.
Chaudhuri Olik
Paladugu Ramamohan Rao
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